What causes Blackspot Algae and how do I get rid of it?
When algae is not treated, and becomes established over weeks or months a root system establishes itself into the pool surface, and like any plant when the conditions are ideal (warm water and low chlorine) it grows and becomes visible. It can be seen either as small black spots or creeping between the tiles or pebble. SOLUTION In its early stages there is a chemical which will clear it up, but in later stages the pool must be emptied, guernied and chemically treated to successfully remove the blackspot.
Black spot algae usually develops when sanitiser levels are too low for some time. It’s not uncommon for it to establish after a pool has been green a few times. The reason it is hard to get rid of is because it digs itself into the surface and has a waxy membrain to protect it. That’s why it’s important to scrub it regularly during treatment, to allow the chemicals to get in. Your local pol shop will have “Granualr Algaecide” for the floor & step areas and use an organic copper based Algaecide. Never use ones that contain Copper Sulphate as this can stain the surface.
